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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9981415 B1

PDFFull Text
Date of Patent:
May. 29, 2018

Filed:

Jun. 19, 2015

Method and apparatus for extrusion of thermoplastic handrail

Applicant:

Ehc Canada, Inc., Oshawa, CA;

Inventors:

Andrew Oliver Kenny, Toronto, CA;

Douglas James Weatherall, Bolton, CA;

Viqar Haider, Markham, CA;

Ronald Harold Ball, Shanghai, CN;

Alexander Stuart Caunce, Cobourg, CA;

Reginald Anthony Butwell, Young's Point, CA;

Assignee:

EHC CANADA, INC., Oshawa, CA;

Attorney:

Bereskin & Parr LLP/S.E.N.C.R.L., s.r.l.

Primary Examiner:

Yogendra N Gupta

Assistant Examiner:

Joseph S Leyson

Int. Cl.
CPC ...
B29C 47/06 (2006.01); B29C 47/02 (2006.01); B29C 47/88 (2006.01); B29C 47/00 (2006.01); B29C 47/28 (2006.01); B29C 47/90 (2006.01); B29K 75/00 (2006.01); B29K 305/12 (2006.01); B29K 105/10 (2006.01); B29L 31/46 (2006.01); B29L 29/00 (2006.01); B29L 31/30 (2006.01); B29L 31/00 (2006.01); B29C 47/10 (2006.01); B29C 47/14 (2006.01); B29C 47/34 (2006.01); B29C 70/16 (2006.01); B29C 47/08 (2006.01); B29K 105/20 (2006.01);
U.S. Cl.
CPC ...
B29C 47/025 (2013.01); B29C 47/003 (2013.01); B29C 47/0016 (2013.01); B29C 47/0019 (2013.01); B29C 47/0059 (2013.01); B29C 47/026 (2013.01); B29C 47/027 (2013.01); B29C 47/065 (2013.01); B29C 47/28 (2013.01); B29C 47/8805 (2013.01); B29C 47/8815 (2013.01); B29C 47/8845 (2013.01); B29C 47/8865 (2013.01); B29C 47/8895 (2013.01); B29C 47/90 (2013.01); B29C 47/908 (2013.01); B29C 47/0898 (2013.01); B29C 47/1036 (2013.01); B29C 47/1045 (2013.01); B29C 47/145 (2013.01); B29C 47/34 (2013.01); B29C 47/884 (2013.01); B29C 47/904 (2013.01); B29C 47/905 (2013.01); B29C 47/906 (2013.01); B29C 70/16 (2013.01); B29K 2075/00 (2013.01); B29K 2105/10 (2013.01); B29K 2105/20 (2013.01); B29K 2305/12 (2013.01); B29L 2029/00 (2013.01); B29L 2031/003 (2013.01); B29L 2031/3029 (2013.01); B29L 2031/463 (2013.01); B29L 2031/709 (2013.01);
Abstract

A method and apparatus for extrusion of an article is provided. A die assembly can apply flows of thermoplastic material to an array of reinforcing cables to form a composite extrusion. A slider fabric can be bonded to one side of the composite extrusion. After exiting the die assembly, the slider fabric can act to support the extrudate as it passes along an elongate mandrel, which can cause the base of the slider fabric to change shape from a flat profile to the final internal profile of the article. The extruded article can then be cooled to solidify the material. The die can include cooling for the slider fabric and means for promoting penetration of the thermoplastic into reinforcing cables.

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